Decorative chair back cover



FIG. 1 is a perspective view of a decorative chair back cover;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a side view thereof, the opposite side being a mirror image;

FIG. 5 is a top view thereof; and,

FIG. 6 is a bottom view thereof.

The broken lines illustrate environmental subject matter and form no part of the claimed design. 

CLAIM The ornamental design for a decorative chair back cover, as shown and described. 